They should make them work like a Roomba, they will automatically home in on the cart rack.
On second thought, it never works for my Roomba, though, it always ends up stopped under the part of my bed where I can’t reach it.
🤣
I think my method is most efficient. Just bring a cart in with you. Or two...
Heck, I did that when we went to costco a few days ago.
Roomba’s are Great CAT Toys!